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x64-
comp., MS	x64 (Pertaining to the x64 64-bit architecture. The x64 platform enables 64-bit memory addressing, and can run on processors such as AMD Athlon 64, AMD Opteron, Intel Xeon with EM64T, and Intel Pentium 4 with EM64T)

x64: 2 phrases in 1 subject

Microsoft

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